Revert of [ia32] Fixes a bug in cmpw.

test/cctest/test-assembler-ia32.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1479 matching lines @@
   code->Print(os);
 #endif
   F1 f = FUNCTION_CAST<F1>(code->entry());
   for (int i = 0; i < kNumCases; ++i) {
     int res = f(i);
     ::printf("f(%d) = %d\n", i, res);
     CHECK_EQ(values[i], res);
   }
 }
 
-TEST(Regress621926) {
-  // Bug description:
-  // The opcodes for cmpw r/m16, r16 and cmpw r16, r/m16 were swapped.
-  // This was causing non-commutative comparisons to produce the wrong result.
-  CcTest::InitializeVM();
-  Isolate* isolate = reinterpret_cast<Isolate*>(CcTest::isolate());
-  HandleScope scope(isolate);
-  Assembler assm(isolate, nullptr, 0);
-
-  int16_t a = 42;
-
-  Label fail;
-  __ mov(ebx, Immediate(reinterpret_cast<intptr_t>(&a)));
-  __ mov(eax, Immediate(41));
-  __ cmpw(eax, Operand(ebx));
-  __ j(above_equal, &fail);
-  __ cmpw(Operand(ebx), eax);
-  __ j(below_equal, &fail);
-  __ mov(eax, 1);
-  __ ret(0);
-  __ bind(&fail);
-  __ mov(eax, 0);
-  __ ret(0);
-
-  CodeDesc desc;
-  assm.GetCode(&desc);
-  Handle<Code> code = isolate->factory()->NewCode(
-      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
-
-  F0 f = FUNCTION_CAST<F0>(code->entry());
-  CHECK_EQ(f(), 1);
-}
-
 #undef __